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  1. CDRIVE

    cut the power of a LED light from 12v to 500mA

    Uh, isn't that what we do here? Today is Saturday, so I'll be heading out to my watering hole soon. When I return I'll probably be inclined to agree with you. :D Chris
  2. CDRIVE

    cut the power of a LED light from 12v to 500mA

    The LED isn't an unknown variable. At least it doesn't have to be. Tom can measure the voltage drop across a single LED. It then becomes a Constant. He can also extract this information from LED data sheets. Admittedly Vf increases slightly with an increase in LED current but he only needs a...
  3. CDRIVE

    Flashing 5watt led?

    Not a bad thought but I think Sam is using D cells or C cells. If he had room for one it would be a good idea regardless but I think Sam's housing may negate that. Sam what are you using? I think my original circuit gave Sam a pulse width = 50mS but I reduced it to 10mS after reading...
  4. CDRIVE

    Flashing 5watt led?

    The data sheet for that LED is a bit odd. Typically components are rated with at least two current maximums continuous and pulsed with PW being specified. I see only 700mA Max listed so that's what we'll work with. You can place another 5R/2W resistor in parallel with R3. This will double...
  5. CDRIVE

    My New Toy

    Is that you Steve after a few hours of partying? Chris
  6. CDRIVE

    My New Toy

    That's what I was thinking but she'll squawk about that. She's already complaining that she's the one that's always carrying any extra crap. I assure her that I'm helping her loose weight that way! :D Chris
  7. CDRIVE

    Flashing 5watt led?

    I'm impressed with you!! We rarely get to see the end product. Cool! Chris
  8. CDRIVE

    Simple Phototransistor switch circuit

    If these are 20mA LEDs you don't need a FET. The LM555 will source and sink 200mA. The FET you're using is way overkill anyway. Chris
  9. CDRIVE

    Can You Find Funny Statement?

    That's just one of the joys of retirement. I can now do things that please me without any thought to the time spent doing it. Chris Edit: Hey! No one has found the "Huh?" statement yet.
  10. CDRIVE

    hall sensor - quiscent voltage

    This is the second nasty cold I've had in the last 3 weeks. Ugh! I'm saddling up and going anyway! ;) Chris
  11. CDRIVE

    Simple Phototransistor switch circuit

    Have you performed a temperature analysis on your circuit? Chris
  12. CDRIVE

    Can You Find Funny Statement?

    I've done without it this long so I'm in no rush. I didn't watch the video because of the topic. I just like watching non CNC machine shop vids and he's pretty good with those. Chris
  13. CDRIVE

    My New Toy

    Are you saying I have a fat face or that all this exercise will make me look younger? :p Ha! I've been considering buying or building a trailer to cart larger road jewels I find. ;) Chris
  14. CDRIVE

    hall sensor - quiscent voltage

    Second apology. I have no idea how I transposed data for an A1301 - A1302, who's outputs go to near 0V with no magnetic field, with your A1321 - A1323 which don't. Chris
  15. CDRIVE

    Can You Find Funny Statement?

    CC, thanks for the info. Yeah, most of them are jacking the S&H to ~ $16.00. Chris
  16. CDRIVE

    Can You Find Funny Statement?

    CC who is the mfr of the model you bought? There are a boat load of Realistic (RS) hand held models on ebay. Chris
  17. CDRIVE

    My New Toy

    Guys, I passed a literal milestone today. I've peddled 1005 miles since Dec 1, 2012. According to my doctor I've lost 15 pounds, PSA, Liver, BP, Cholesterol, in fact all my readings have improved. The best part is I haven't given up a single beer or plate of pasta! The wife and I ride just about...
  18. CDRIVE

    Can You Find Funny Statement?

    Was it really that long? I thought it was about 5min. I'm going to check out those tape erasers though! ;) Chris
  19. CDRIVE

    Can You Find Funny Statement?

    Yes but what exactly causes HSS tooling to magnetize from use? I hate it when it happens because the chips never clear themselves. Chris
  20. CDRIVE

    Can You Find Funny Statement?

    Sorry Steve. No virtual beer for you. :D Those are all good except none of them have the "what?" factor like the statement I'm referring to. I ignored those because I don't expect casual electronics dabblers to know the structure of a shaded pole motor. Btw, I'm not sure that I disagree...
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